Zachary Nichols, DO
NPI 1538658752 · Internal Medicine Physician · Sonora, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Nichols, DO is a Internal Medicine Physician provider in Sonora, CA (NPI 1538658752).
Provider details
- NPI number
- 1538658752
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A18909 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,946 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 731 | $116 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 389 | $113 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 296 | $170 |
| Critical Care, First 30-74 Minutes99291 | 205 | $207 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 167 | $78 |
| Advance Care Planning, First 30 Minutes99497 | 139 | $74 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azithromycin | 34 | 32 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 30 | 29 |
| Levofloxacin | 26 | 26 |
| Naloxone Hcl | 25 | 25 |
| Prednisone | 19 | 19 |
| Atorvastatin Calcium | 18 | 18 |
| Cefdinir | 17 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$21 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-05-02
- Last updated
- 2021-06-29
- Certified
- 2021-06-29
Frequently asked questions
- What is Zachary Nichols's NPI number?
- Zachary Nichols's National Provider Identifier (NPI) is 1538658752, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Nichols's specialty?
- Zachary Nichols is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Nichols located?
- Zachary Nichols's practice location on file with NPPES is 1000 Greenley Rd, Sonora, CA 95370-5200.
- What is Zachary Nichols's phone number?
- The practice phone number listed in the NPPES registry for Zachary Nichols is (209) 536-5000.
- Does Zachary Nichols accept Medicare?
- Zachary Nichols is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Nichols's NPI active?
- Yes — Zachary Nichols's NPI (1538658752) is active in the NPPES registry as of the last update on 2021-06-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.